Boiler



(No Model.) 3 SheetsSheet 1.

N. L. WARREN.

BOILER.

No. 569,477. Patented Oct. 13, 1896.

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(No Model,) 3 sheets sheet 2.

N. L. WARREN.

BOILER.

No. 569,477. Patented Oct. 13, 1896.-

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(No Model.)

' N. L. WARREN.

BOILER.

Patented Oct. 13, 1896.-

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UNITED STATES PATENT OFFICE.

NE\VTON I. \VARREN, OF SPRINGFIELD, OIIIO.

BOILER.

SPECIFICATION forming part of Letters Patent No. 569,477, dated October13, 1896.

Application filed March 12, 1896. Serial No. 582,961. No modelfl To allwhom it may concern.-

Be it known that I, NEWTON L. WARREN, a citizen of the UnitedStates,residing at Springfield, in the county of Clark and State ofOhio, have invented certain new and useful Improvements in Boilers, ofwhich the following is a specification, reference beinghad therein tothe accompanying drawings.

My invention relates to certain new and useful improvements in boilersof the cl ass kn own as water-tube boilers.

My invention has reference to an endless upper water and steam drum andan endless lower water-drum; has reference to tubular baffle-wallsupports; has reference to a new organization and arrangement of theparts, whereby a compact and highly efficient boiler is produced; hasreference to mechanism for producing a positive and rapid downcirculation; has reference to a feed-water attachment and distributer,and has reference to details of construction hereinafter appearing, andparticularly pointed out in the claims.

In the accompanying drawings, on which like reference-letters indicatecorresponding parts, Figure 1 is a vertical sectional elevation taken onthe line .2 z of Fig. 5; Fig. 2, a sectional plan view on the line y yof Fig. 1; Fig. 8, a detail perspective view of a portion of thefeed-water-heater pipes; Fig. at, a de tail perspective view of aportion of the lower drum, circulating-tubes, outer casing, and liningfor same; Fig. 5, a sectional plan view on the line to :0 of Fig. 1;Fig. 6, a detail view of the hanger for supporting the distributingpipewithin the upper water and steam drum; Fig. 7, a sectional View of theupper drum, one of the circulating-tubes, the distributer, and one ofits nozzles; and Fig. 8, a detail sectional view of one of the manholes.

The letter A represents a furnace, preferably constructed of fire-brickand surrounded by a metal casing B. Supported within the furnace by thebrick walls is a suitable iron grate O of the ordinary or any approvedconstruction. A door D opens into this furnace on a level with thegrate, as shown in Fig. 1. The fire-brick extends partly around andnearly to the top of an endless water-drum E, and also partiallysupports said drum. This drum is additionally supported, however, by aflange F, extending from the casing B.

number of up-and-down circulating-tubes G extend upward from the drum Eand are connected at their upper ends to what I term an endless waterand steam drum H. The connections between these tubes and each drum aremade perfectly tight in the ordinary or any approved manner.

It will be seen from Figs. 2 and 5 that the drums E and H, respectively,are made in the form of a square with their corners cut off, but theymay be made in any other form so long as the drums are endless. Withinthe upper drum I mount what I term my distributing-pipe I. This pipe Iis suspended in the drum H by suitable hangers J, which, at their upperends, hook into eyes K, formed in angle-irons secured to the drum H inany convenient manner, and are of sufficient number to allow of properlysupporting the distributing-pipe. From the distributing-pipe extends aseries of nozzles L, one of which is shown in detail in Fig. 7. Thesenozzles extend a short distance into the upper end of each of the outerrow of circulating-tubes G, for the purpose hereinafter appearing.

I will now refer to my feed-water-heating device. It is located,preferably, in the upper portion of my boiler, and consists of threesets of heating-coils composed of short-length pipes M, which arepreferably placed in a vertical position. The first pipe of each ofthese three sets is connected, at its lower end with the feed-water pipeN, and at its upper end with the next vertical pipe in its series by ahorizontal hollow casting M. The lower end of the second pipe in eachset isconnected with the lower end of the third pipe in its series by anelbow M. Thus the pipes in each series are alternately connected at thetop and bottom and extend around to near their starting-point, wheretheir upper ends connect with the pipe 0, which in turn connects withthe distributing-pipe 1. Thus the cold water, as it enters the boiler,passes around through these three series of feed-water pipes before itenters the distributing-pipe. These feed-water pipes are supported bythe upper baffle-wall S, as will hereinafter appear.

It will be seen that I have incased the outer row of circulating-tubesin a brick wall P, or other suitable material, about which is asheet-metal casin g P. This prevents them from becoming as highly heatedas the inner tubes and consequently allows the water to flow downward inthem. In order to more fully aid in this down circulation, I introducenozzles L, attached to the distributing-pipe I, into the upper end ofeach of these outer tubes, and which conduct the cooler feedwater intothe same. This causes a forced positive down-current in the outer row oftubes.

I will now refer to what I term secondary circulating-tubes. Theseconsist of a series of pipes Q, connected to the lower drum, as shown inFig. 1, and extending up along the outside of the boiler a shortdistance, then turning and entering the boiler, passing out at theopposite side somewhat higher up than where they enter to give thedesired inclination, and thence they pass up along the outer side to anupper set of cross-pipes S, which extend underneath the feed -water-heater pipes and support them, together with the baffle-wall S, thepipes of the feed-water heater being mounted directl y on saidbafflewall. These upper series of pipes are connected together by meansof pipes T and T, respectively. Short pipes U connect with the pipe Tand lead into the steam and water drum H, thus making a completeconnection between the lower water-drum and the upper steam and waterdrum. Referring again to the lower set of cross-pipes or secondarycirculating pipes it will be seen in Fig. 1 that they are also adaptedto support the lower baffle-wall X, which is made of fire-brick or othersuitable material. These pipes, being located directly over the furnace,become intenselyhot, and the water passes veryrapidly upward throughthem and keeps them at a uniform temperature. This prevents their rapiddestruction, and consequently they form a desirable support for thebaifle-wall, which would quickly burn out if formed of iron girders. Itwill also be seen that wherever there is a turn in the secondarycirculating-tubes I have provided Ts with removable caps or plu gs, asshown at V W X Y Z, 850., in Figs. 1, 2, and 5. These caps or plugs maybe quickly removed when it is desired to inspect or clean the secondarycirculating-tubes. I have also provided a union a on each pipe Q, whichreadily allows these tubes to be removed, should there be a necessityfor doing so.

In order to properly clean the upper and lower drums and verticalcirculating-tubes, I provide manholes e in said drums. These manholesare formed in the usual manner and consist of a plate e, held againstflanges f by means of bolts connecting said plate with what I termspanners g, and are held in position by nuts g on the outer ends of saidbolts. The flanges f are riveted or otherwise secured to the endlessdrums and are so formed that the plate 6' may fit tightly against them.Thus all parts of my boiler may be readily cleaned should scale orforeign matter collect in them, or inspected,

which is of great practical importance in boiler construction. As I haveconstructed my boiler there will be a minimum amount of lime and otherimpurities in the water to collect in the drums and tubes because myfeed-water pipes are designed and so located that all, or very near all,deposit will be made in them. These feed-water-heater pipes are readilycleaned and all lime scraped from them by simply removing screw-plugs1), 0pposite the upper end of each pipe.

A suitable steam-pipe c conducts the live steam from the steam and waterdrum to any desired place. The outer casing P extends up over the top ofthe upper drum and is In operating my boiler I fill the lower drum,

the circulating-tubes, the feed-water tubes, and about one-third of thesteam and water drum with water. This gives ample room for steam. Theflames and hot gases are conducted up between the circulating-tubesthroughout their entire length by the arrangement of my battle-walls,and a large proportion passing between the upper drum and the upperbaffle-walls envelops the feed-water pipes, which, being fed with coldwater, extract a large number of units of heat and thus prevent whatwould otherwise be a large loss of heat up the smoke-stack. Myconstruction is also particularly adapted for great economy of fuel,being arranged in a square and having the fire-box located in the centerwith the circulating-tubes all around the boiler, and the drums beingendless with their whole length exposed to heat. I am also enabled to doaway with the expensive and independent feed-water heaters used inconnection with ordinary boilers.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-'- 1. In a water-tube boiler, anupper and lower endless drum, tubes connecting said drums, one or moreseries of feed-water pipes adapted to receive and initially heat thewater by being located in the heat-discharging passage, and adistributing-pipe connected to said feed-water pipes for distributingthe feed-water to said endless drums and circulating-tubes.

2. In a water-tube boiler, an upper and 3. In a water-tube boiler, thecombination with an upper and lower endless drum and upand-downcirculating-tubes connecting them together, of a feed-water heateradapted to receive water from a supply-pipe, a distributing-pipe locatedwithin the upper drum and adapted to receive water from the feed-waterheater, a series of nozzles connected to said distributing-pipe andadapted to extend a short distance into the outer series ofwatercirculating tubes and conduct the feed-water into such outer tubes,whereby the down-current in said outer tubes is augmented.

4. In a water-tube boiler, the combination with an upper and lowerendless drum, with up-and-down circulating-tubes connecting said drumstogether, of a fire-box extending partly around said lower drum andnearly to its upper surface and adapted to partially support said drum,a flanged metal casing encircling said fire-box and also supporting saiddrum, an inner wall of brick or other suitable non-conducting materialadapted to incase each of the down-circulating tubes, and a metal shellor casing adapted to encircle or incase said wall as shown anddescribed.

5. In a water-tube boiler, the combination with an upper and lowerendless drum connected together by up-and-down water-circulating tubes,a distributing-pipe suspended in said upper drum, angle-irons with eyesin one part of them secured to the interior of said upper drum, hooksadapted to be inserted in said eyes for suspending saiddistributingpipe, and nozzles connecting each down-ciroulatin g tubewith said distributing-pipe, and a manhole in each of said drums toallow of the interior of the drums and circulatingpipes being cleaned,as shown and described.

6. In a water-tube boiler, the combination with a lower and upperendless drum and upand-down tubes connecting them together, of afeed-water heater located essentially within the heat-dischargingpassage of the apparatus whereby it is subjected to sufficient heat,said heater at the discharge end being in communication with theinterior of the boiler so that water entering said heater is conductedthrough it into said passage whereby it becomes heated and is thendischarged into the boiler proper to supply the same with heated water,substantially in the manner and for the purpose shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

NEWTON L. \VARREN.

Witnesses:

OLIVER H. MILLER, W. M. MCNAIR.

